/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iceberg.deletes;

class EmptyPositionDeleteIndex implements PositionDeleteIndex {

  private static final EmptyPositionDeleteIndex INSTANCE = new EmptyPositionDeleteIndex();

  private EmptyPositionDeleteIndex() {}

  static EmptyPositionDeleteIndex get() {
    return INSTANCE;
  }

  @Override
  public void delete(long position) {
    throw new UnsupportedOperationException("Cannot modify " + getClass().getName());
  }

  @Override
  public void delete(long posStart, long posEnd) {
    throw new UnsupportedOperationException("Cannot modify " + getClass().getName());
  }

  @Override
  public boolean isDeleted(long position) {
    return false;
  }

  @Override
  public boolean isEmpty() {
    return true;
  }

  @Override
  public String toString() {
    return "PositionDeleteIndex{}";
  }
}
